The list of "most dangerous" serial killers is subjective and can vary according to various criteria, such as the number of victims, the brutality of the crime, or the impact on society. However, here are ten notable serial killers known for their heinous acts: 

 1. Harold Shipman (UK): 

 Known as "Dr. Death", Shipman was a British doctor who killed around 218 of his patients using lethal doses of the drug between 1975 and 1998.  

 2. Luis Garavito (Colombia): 

 Garavito, also known as "La Bestia" (The Beast), is one of the most notorious serial killers in history. He targeted vulnerable boys, sexually abused them, and murdered at least 138 victims between 1992 and 1999. 

  3. Gary Ridgway (USA): 

 Known as the "Green River Killer," Ridgway was convicted of murdering at least 49 women in Washington state between 1982 and 2000. He primarily targeted prostitutes and fugitives. 

 4. Pedro López (Colombia): 

 López, dubbed the "Monster of the Andes", confessed to raping, torturing and murdering about 300 young girls in Colombia, Ecuador and Peru in the 1970s.  

 5. Ted Bundy (USA): 

 Bundy was a notorious American serial killer and gangrene who abducted, raped, and murdered many young women in the 1970s. His exact number of victims is unknown, but is known. Supposedly about 30 people or more.  

 6. Andrei Chikatilo (Soviet Union/Russia): 

 Chikatilo, also known as "The Butcher of Rostov" or "The Butcher of Rostov", murdered and maimed at least 53 people, mostly children and teenagers, between 1978 and 1990 in the Soviet Union. Shove. 

 7. Jeffrey Dahmer (USA): 

 Dahmer, also known as the "Milwaukee Cannibal" or the "Milwaukee Monster", was a serial killer and sex offender who murdered and dismembered 17 young men and boys between 1978 and 2005. 1991.  

 8. John Wayne Gacy (USA): 

 Gacy, also known as the "Killer Clown," sexually assaulted and murdered at least 33 young men and boys between 1972 and 1978. He buried most of his victims under his house. 

  9. Aileen Wuornos (USA): 

 Wuornos was a serial killer who killed seven men in Florida between 1989 and 1990. She claimed to have acted in self-defense while practicing prostitution. 

 10. Alexander Pichushkin (Russia): 

 Pichushkin, also known as the "Chessboard Killer", killed at least 48 people, mostly in Bitsa Park in Moscow, between 1992 and 2006. He mainly targeted elderly men and lured them in. park before the murder. 

 Please note that this list includes some of the most notorious serial killers, but it is by no means a comprehensive or definitive ranking. Assessing the danger and notoriety of a serial killer can vary based on different sources and perspectives.